Analysis Of Scheduling Acceleration Of Worship Building Construction In Dili Timor-Leste Using Time Cost Trade Off (TCTO) Method

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--56

Analysis Of Scheduling Acceleration Of Worship

Building Construction In Dili Timor-Leste Using

Time Cost Trade Off (TCTO Method

)

Jaime Ximenes Soares Maia Lalu Mulyadi Edi Hargono Dwi Putanto

,

Abstract: Planning is the most significant part to achieve success of construction project. The planning itself towards construction project has an impact on revenue in the project itself. Frequently, a project must be completed sooner than its normal time. In this case, the project leader is expected to issue how to accelerate the completion of the project with a minimum cost. The objectives that are expected to achieve from this research are: 1) analyzing the normal time scheduling?, 2) analyzing the scheduling acceleration of the development 3) analyzing changes in the cost increase in development. From the acceleration with time cost trade off (TCTO) method on a worship building project in Dili Timor-Leste, it is optimum to be able to reduce the time duration by adding resources/working groups, and having project cost increase. In the worship building construction project in Dili Timor-Leste, the initial duration of the project is 223 days and it is changed to 181 days, so that there are 34 days of difference from the normal schedule of the project. Where

under normal schedule condition, the normal cost obtained is $377.552.868, thus after doing acceleration analysis with time cost trade off (TCTO) method on the project, there is an additional direct cost in the project of $1.123,08 so that the total project cost is $ 378.675,95.

Index Terms: acceleration, building, time cost trade

—————————— ——————————

1. INTRODUCTION

The Government of the Democratic Republic of Timor-Leste

has established a development plan in Timor-Leste, especially

in Dili district as the capital city of the country which has the

well-known name as an education city, so that many

universities in this city are often found. Because it has many

universities, so the city of Dili becomes one of the main

destinations for those who are willing to study in college.

[0]

The

number of inhabitants which is increasing every year must be

balanced with the growth or improvement of facilities to meet

the needs of the increasing population

, [

1].

[0]

Public facilities,

such as roads, houses for shelter, houses of worship and so

forth, need to be considered in order to achieve the stability of

a city in terms of service to the community, [

2].

[0]

One of the

public facilities that is not less important to support the growth

of the population in the city is a place of worship, [

3].

[0]

The

existence of a worship place is very important.

[0]

Especially in

Dili with many people from inside and outside of the city with

diverse religions, this city must be able to meet the needs of

the population will be place of worship

.

[0]

With the better facilities

of worship, then the needs of the community of worship place

can be fulfilled

.

Timor-Leste Christian Church (GKTL) of Dili

district is one of the institutions that sees the needs.

[0]

The need for places of worship from the people of Dili is highly

on demand, so that the services provided can be maximized

.

This is the Timor-Leste Christian Church (GKTL) foundation of

[0]

Dili in undertaking the construction of additional facilities to

meet the needs of the people of Dili in worshipping

. The

[0]

construction of a church building is generally same as that of a

typical building [

1,4].

[0]

Stages of work and methods of

implementation are generally same as the usual project work.

In terms of construction management, it is also the same, so

[0]

the problems of scheduling, methods of implementation,

estimation of cost, manpower or human resources have

become mandatory in the construction [

5]. Problems or

constraints in the project are caused by the delay in the

delivery of roofing materials such as steel, and also the

shortage of manpower and experts, so that the delay occurs in

the implementation. In Timor Leste, many people work not in

line with their areas of expertise. The problems in the

construction project of Christian church building in Dili

Timor-Leste is caused by the delay in the delivery of materials sent

from Surabaya. Therefore, it becomes a factor of delay. The

author will conduct an analysis of the acceleration of the

project completion by comparing the addition of working hours

and the addition of labors as well as experts. The method used

is the method of time and cost exchange (time cost trade off)

and software that will be used is Microsoft Project.

[0]

The

purpose of this method is to accelerate the time of project

implementation and to analyze the effect of time that can be

shortened by the addition of cost to the activities that can be

accelerated in the implementation period, [

6].

[0]

Furthermore, the

objectives that are willing to be achieved from this research

are

:

[0]

1) analyzing the normal time scheduling, 2) analyzing the

scheduling acceleration of the project, and 3) analyzing

changes in the cost increase in the project

.

2. R

ESEARCH

M

ETHOD

This research uses quantitative method to analyze Time Cost

Trade Off (TCTO).

[0]

The analysis plan of the implementation at

normal time is this analysis is conducted to determine the

project time and normal cost as well as logical relationship

between activities according to the plan schedule made by the

contractor and the time acceleration is not done yet, [

7]. Time

and cost analysis with time acceleration is conducted by the

________________________________



Jaime Ximenes Soares Maia is currently pursuing

master degree in Study Program of Engineering,

Concentration on Construction Management. National

Institute of Technology, Malang, Indonesia.

E-mail: [email protected]



Lalu Mulyadi is a lecturer of Study Program of

Engineering,

Concentration

on

Construction

Management. National Institute of Technology,

Malang, Indonesia.

E-mail: [email protected]



Edi Hargono Dwi Putanto is a lecturer of Civil

Engineering

Construction

Management

Concentration, Malang National Institute of

Technology, Indonesia.

(3)

57

application of Time Cost Trade Off method, with the following

provisions: 1) to accelerate the implementation time of

Development Planning Agency at Sub-National Level

(BAPPEDA) building of West Sumba, 2) to obtain the

acceleration of project time, and 3) to obtain the cost of

acceleration of project time. The optimal time and cost

analysis of the project is done after the acceleration of time,

the time acceleration of project implementation at the possible

lowest cost is obtained, [8]. The steps of Data Analysis

conducted in this study include: 1) identifying the remaining

activity implementation plan, 2) identifying the remaining

activity costs under the contract, 3) informing each working

group, 4) making a normal scheduling of the remaining

scheduling and identifying critical path, 5) analyzing cost slope

for all activities, 6) compressing (accelerating) on a critical

path that has the lowest cost slope value, 7) rearranging

scheduling and new critical path time, 8) creating project

duration with target time in the project, 9) re-analyzing step 5

and 8 to reach the target duration, 10) calculating the total cost

= direct cost and indirect cost, 11) calculating the additional

cost.

2 R

ESULT AND

D

ISCUSSION

3.1 Project Scheduling Plan

3.1.1. Identification of Project Description

Activity details depend on the ability of a planner to reduce the

variety of activities of a project that will be implemented.

Details of this activity are presented in the description of the

project activities in which the more detail arranged shows the

more accurate an activity identified.

Table 1. Project Activity Description

NO. WORK DESCRIPTION UNIT VOLUME

I PREPARATORY WORK

1 Location Cleaning m2 ₆₅₂

2 Project Name Board PIECE 1,00

3 Temporary Fence m 85,00

4 Bouwplank Installation m 106,00

5 1 M² Manufacture of cement warehouses and tools m2 _18,00

6 Clean Water Availability LS 1,00

II LAND WORK 1 Soil excavation m3 ₂₈₅ 2 Sand Fill m3 ₁₀₁ 3 Sand Backfill m3 ₁₂ 4 Soil Compaction m3 ₃₇₈ III FOOTING 1 Skewers m3 ₂₁

2 Broken Stone Footing m3 ₆₂

IV WALL WORK

1 Brick Installation (1pc: 4ps) m2 ₆₈₃

2 Brick Installation (1pc: 2ps) m2 ₁₁₉

3 Glass Block Installation m2 ₈

4 Plastering (1pc: 4ps) m2 ₁₆₄₁

5 Plastering (1pc: 2ps) m2 ₂₃₈

6. Rendering m2 ₂₃₅₈

V CONCRETE AND STRUCTURE WORK

1 Story Work m3 ₅₉

2 Footing Cast (150x150x40) - F'c 30 Mpa m3 ₂₄

3 Footing Cast (120x120x40) - F'c 30 Mpa m3 _3,5

4 Middle Plate Footing Cast -f'c 30 Mpa m3 _0,72

5 Column Cast 40x 40 cm (c-1) - f'c 30 MPa m3 ₂₆

6 Column Cast 30x30 Cm (C-2) -F'c 30Mpa m3 _8,5

7 Circle Column Cast with Diameter 40 Cm (C-3) -F'c30 Mpa m3 _6,57

8 Lintel Cast 10x10 Cm - F'c 30 Mpa m3 _2,46

9 Lintel Cast 10x20 Cm - F'c 30 Mpa m3 _0,35

10 Beam Cast 30x40 Cm GB-1) - F'c 25 Mpa m3 _24,45

11 Beam Cast 15x 40 Cm (GB-2) - Fc 25 Mpa m3 _0,88

12 Beam Cast 30x40 Cm (B-1) - F'c 30 Mpa m3 _22,1

13 Beam Cast 20/30 Cm (B-2) F'c 30 Mpa m3 _3,65

14 Beam Cast 20/30 Cm (B-3) F'c 30 Mpa m3 _1,18

15 Plate and Beam Cast 83/30 Cm (SB) - F'c 30 Mpa m3 _6,15

16 Upper Beam Cast 30/40 Cm (TB-1) -F'c 30 Mpa m3 _13,02

19 Secondary Beam 10/20 Cm (PB) -F'c 30 Mpa m3 _1,63

20 Story Plate Cast Height = 12 -F'c 30 Mpa m3 _28,78

21 Upper Plate Cast Height = 12 - F'c 30Mpa m3 _19,28

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58

23 Fascia Board Cast -F'c Mpa m3 _13,92

VI FLOORING

1 Granite Story Installation (60x60cm) m2 ₅₉₀

2 Ceramic Story Installation (60x60 Cm) m2 ₁₅₆

4 Ceramic Installation (60x60 Cm) m2 _16,92

5 Wall Ceramic Installation (20x25 Cm) m2 _15,81

6 Granite Skirting Installation 10x60 Cm m 221

7 Granite Skirting Installation 10x60 Cm m 108

8 Stone Outboard Installation m 36

VII ROOFING

1 Work of Main Building Roofing and Its Completeness Wr 250.175.8.12 kg 6400

2 Building Roofing Construction RHS 100.50. kg 928

3 Girder Installation C150.75.5,5.10 kg 13188

4 Girder Installation C 100.50.20.4 kg 580

5 Strain Installation Ø 12 Mm kg 95

6 Wind Bracing Installation Ø16 Mm kg 373

7 Wire mesh Installation m2 ₆₀₆

8 Aluminum Foil Working m2 ₆₀₆

9 Anti-Corrosion from Aluminum Roof Installation 0.42 Mm m2 ₆₄₁

10 Ridge Roof from Aluminum Installation 0.42 Mm m 41,25

11 Fascia Board Installing, Calsiplank 1x30 cm m 26,59

VIII CEILING

1 Ceiling Board of Gypsum m 433

2 Gypsum Ceiling Work And Wood Frame m2 ₉₅₆

3 Calsiboard Ceiling and Wood Frame m2 ₁₇₅

IX INSTALLATION OF DOORS AND WINDOWS

1 Making and Installation of Door Type D1 unit 2,00

6 Making and Installation of Window Type W1 unit 9,00

9 Making And Installation of Door and Window Type DW1 unit 1,00

10 Ventilation Work Type V1 unit 1,00

11 Ventilation Work Type V2 unit 10,00

X PAINTING 1 Anti-Corrosion Painting m2 ₄₉₇ 2 Steel Painting m2 ₄₉₇ 3 Melamine Painting m2 ₁₃₉ 4 Wall Painting m2 ₂₃₅₈ 5 Ceiling Painting m2 ₁₁₉₆ 6 Waterproofing Painting m2 ₁₇₁ XI PIPING

1 Galvanized Pipe Installation m 56,00

2 Pvc Pipe Installation m 54,00

3 Pvc Pipe Installation m 42,00

4 I Pvc Pipe Installation m 28,00

5 Water Faucet Installation pcs 5,00

6 Washbasin Water Faucet Installation pcs 3,00

7 Hand-washing Faucet Installation unit 5,00

8 Mirror Installation in Washbasin unit 3,00

9 Floor Drain Installation unit 5,00

10 Washbasin Installation unit 3,00

11 Sitting Closet Installation unit 5,00

12 Tissue Place Installation unit 5,00

13 Soap Place Installation unit 1,00

14 Reinforced Concrete Septic Tank and Infiltration Well unit 1,00

15 Water Pump unit 1,00

16 Stainless Steel Tank with 1600 Liters Capacity unit 2,00

XII ELECTRICITY WORK

1 NYM Cable Point 3 x 2.5 mm2 Installation point 68,00

2 Electrical Current Outlet and NYM Cable 3 x 2.5 mm2 Installation point 21,00

3 Electrical Current Outlet for Ac NYY 3x4 mm2 Installation point 5,00

4 Single Switch Installation pcs 9,00

5 Multiple Switch Installation pcs 11,00

6 Ex-Philips Light Point Installation pcs 16,00

7 AC Installation pcs 5,00

(5)

59

9 Neon Lamp Installation Unit 30,00

10 Down Light Lamp Installation Unit 2,00

14 Spotlight Installation Unit 2,00

15 Fan Installation Unit 3,00

16 Fan Installation Unit 3,00

17 Ac 2Pk Installation Unit 5,00

18 Exhaust Fan Installation Unit 3,00

19 MCB Installation Set 1,00

20 ARDE Installation Pcs 1,00

21 Panel Board Installation Unit 1,00

22 Electric Meters Installation Unit 1,00

Source: Project Data of 2016

3.1.2 Project Cost Identification under the Contract

Table 2. Recapitulation of Christian Church Project Construction Budget in Dili Timor-Leste

No. Work Description Cost Total

1 Preparatory Work $ 6.809,88

2 Land Work $ 4.719,2

3 Footing $ 5.558,4

4 Wall $ 25.081,9

5 Concrete and Structural Work $ 123.428

6 Flooring $ 54.621,5

7 Roofing $ 63.860,08

8 Ceiling $ 13.709,9

9 Installation of Doors and Windows $ 23.878,5

10 Painting $ 24.973,9

11 Piping $ 11.708,1

12 Electricity Work $ 19.097,6

GREAT AMOUNT OF COST $ 377.552,868

The plan and realization of the work are done by using Bar

Chart method on the Christian Worshipping Building Project in

Dili with the budget year of 2016. It is completed by MAIDALO

I CONSULTANT, LDA dated on June 1, 2016 with contract

value of IDR $ 377.552,868

3.1.3. Identification of Existing Condition Project

Scheduling

Based on the data and the progress report obtained show that

the implementation of the construction of the Worship Building

in Dili Timor Leste, up to the 17th week of the 5th month, the

new implementation progress reaches 1,34% of the plan of

31,24%, and it has deviation increase in the 18th week of the

5th month, progress of new implementation reaches 33,9%

from plan that is 37,5 and it has deviation decrease from the

15th week of the 5th month to the additional time for

completion of project implementation provided by the

government.

(6)

60

3.2 Analyzing Scheduling Implementation of Activity at

Normal Time

3.2.1 Equalizing Work Volume

If you are using Word, use either the Microsoft Equation Editor

or the MathType add-on (http://www.mathtype.com) for

equations in your paper (Insert | Object | Create New |

Microsoft Equation or MathType Equation). “Float over text”

should not be selected. Number After the activities and the

costs are identified, then each activity will be described again

and work volume equalization is done. Example of volume

equalization

0. 15 = $ 2,40/ $ 16,00

960 = 6400 m3 x 0.15

3991 = 960 + 139,2 + 1978 + 87 + 28 +14+ 56 + 83 + 148 +

461 +38+27

Table 4. Work Volume Equalization

NO. WORK DESCRIPTION UNIT Volume Unit Price Equivalent _Volume

1 2 3 4 5 c

I _{PREPARATORY WORK}

1 Location Cleaning m2 ₆₅₂ 1,10

67

2 Project Name Board piece 1,00 2,17

3 Temporary Fence m 85,00 38,33

4 Bouwplank Installation m 106,00 7,27

5 1 M² Manufacture of cement warehouses and tools. m2 _18,00 102,40

6 Clean Water Availability ls 1,00 218,20

II LAND WORK 1 Soil excavation m3 ₂₈₅ _5,380 241 2 Sand Fill m3 ₁₀₁ _19,60 3 Sand Backfill m3 ₁₂ _2,000 4 Soil Compaction m3 ₃₇₈ _3,100 III FOOTING 1 Skewers m3 ₂₁ _35,33 72

2 Broken Stone Footing m3 ₆₂ _79,08

IV WALL WORK

1 Brick Installation (1pc: 4ps) m2 ₆₈₃ _12,00

250

2 Brick Installation (1pc: 2ps) m2 ₁₁₉ _12,40

3 Glass Block Installation m2 ₈ _100,50

4 Plastering (1pc: 4ps) m2 ₁₆₄₁ _6,82

5 Plastering (1pc: 2ps) m2 ₂₃₈ _6,43

6 Rendering m2 ₂₃₅₈ _0,78

V CONCRETE AND STRUCTURE WORK

1 Story Work m3 ₅₉ _110,90

67

2 Footing Cast (150x150x40) - F'c 30 Mpa m3 ₂₄ _224,00

3 Footing Cast (120x120x40) - F'c 30 Mpa m3 _3,5 _315,00

4 Middle Plate Footing Cast -f'c 30 Mpa m3 _0,72 _358,00

5 Column Cast 40x 40 cm (c-1) - f'c 30 MPa m3 ₂₆ _448,80

6 Column Cast 30x30 Cm (C-2) -F'c 30Mpa m3 _8,5 _1.084,56

7 Circle Column Cast with Diameter 40 Cm (C-3) -F'c30 Mpa m3 _6,57 _434,00

8 Lintel Cast 10x10 Cm - F'c 30 Mpa m3 _2,46 _1.024,30

9 Lintel Cast 10x20 Cm - F'c 30 Mpa m3 _0,35 _1.088,62

10 Beam Cast 30x40 Cm GB-1) - F'c 25 Mpa m3 _24,45 _274,98

11 Beam Cast 15x 40 Cm (GB-2) - Fc 25 Mpa m3 _0,88 _{$ 486,88}

(7)

61

13 Beam Cast 20/30 Cm (B-2) F'c 30 Mpa m3 _3,65 _998,86

14 Beam Cast 20/30 Cm (B-3) F'c 30 Mpa m3 _1,18 _879,89

15 Plate and Beam Cast 83/30 Cm (SB) - F'c 30 Mpa m3 _6,15 _345,80

16 Upper Beam Cast 30/40 Cm (TB-1) -F'c 30 Mpa m3 _13,02 _456,89

17 Upper Beam Cast 25/35 Cm (TB-2) -F'c 30 Mpa m3 _8,02 _1.832,44

18 Upper Beam Cast 25/35 Cm (TB-3) -F'c 25 Mpa m3 _0,21 _924,48

19 Secondary Beam 10/20 Cm (PB) -F'c 30 Mpa m3 _1,63 _1.498,21

20 Story Plate Cast Height = 12 -F'c 30 Mpa m3 _28,78 _540,86

21 Upper Plate Cast Height = 12 - F'c 30Mpa m3 _19,28 _632,20

22 Middle Plate Cast Height = 15 Cm -F'c 30 MPa m3 _7,12 _768,48

23 Fascia Board Cast -F'c Mpa m3 _13,92 _149,44

TOTAL CONCRETE WORK

VI FLOORING

1 Granite Story Installation (60x60cm) m2 ₅₉₀ _78,90

692

2 Ceramic Story Installation (60x60 Cm) m2 ₁₅₆ _24,57

3 Ceramic Installation (60x60 Cm) m2 _16,92 _33,28

4 Wall Ceramic Installation (20x25 Cm) m2 _15,81 _25,31

5 Granite Skirting Installation 10x60 Cm m 221 6,97

6 Granite Skirting Installation 10x60 Cm m 108 6,53

7 Stone Outboard Installation m 36 28,56

VII ROOFING

1 Work of Main Building Roofing and Its Completeness Wr 250.175.8.12 kg 6400 2,40

3991

2 Building Roofing Construction RHS 100.50. kg 928 2,40

3 Girder Installation C150.75.5,5.10 kg 13188 2,40

4 Girder Installation C 100.50.20.4 kg 580 2,40

5 Strain Installation Ø 12 Mm kg 95 2,40

6. Wind Bracing Installation Ø16 Mm kg 373 2,40

7. Wire mesh Installation m2 ₆₀₆ _2,20

8 Aluminum Foil Working m2 ₆₀₆ _3,90

9 Anti-Corrosion from Aluminum Roof Installation 0.42 Mm m2 ₆₄₁ _11,50

10 Ridge Roof from Aluminum Installation 0.42 Mm m 41,25 14,85

11 Fascia Board Installing, Calsiplank 1x30 cm m 26,59 16,00

VIII CEILING

1 Ceiling Board of Gypsum m 433 2,64

754

2 Gypsum Ceiling Work And Wood Frame m2 ₉₅₆ _9,81

3 Calsiboard Ceiling and Wood Frame m2 ₁₇₅ _18,19

IX INSTALLATION OF DOORS AND WINDOWS

1 Making and Installation of Door Type D1 unit 2,00 1.224,09

20

2 Making and Installation of Door Type D2 unit 1,00 1.098,70

3 Making and Installation of Door Type D3 unit 1,00 643,00

6 Making and Installation of Window Type W1 unit 9,00 657,98

(8)

62

8 Making and Installation of Window Type W3 unit 1,00 480,08

9 Making And Installation of Door and Window Type DW1 unit 1,00 990,08

10 Ventilation Work Type V1 unit 1,00 223,89

11 Ventilation Work Type V2 unit 10,00 225,49

X PAINTING 1 Anti-Corrosion Painting m2 ₄₉₇ _2,43 2317 2 Steel Painting m2 ₄₉₇ _5,67 3 Melamine Painting m2 ₁₃₉ _10,78 4 Wall Painting m2 ₂₃₅₈ _5,27 5 Ceiling Painting m2 ₁₁₉₆ _5,27 6 Waterproofing Painting m2 ₁₇₁ _4,20 XI PIPING

1 Galvanized Pipe Installation m 56,00 8,35

548

2 Pvc Pipe Installation m 54,00 6,89

3 Pvc Pipe Installation m 42,00 10,93

4 I Pvc Pipe Installation m 28,00 21,38

5 Water Faucet Installation pcs 5,00 24,67

6 Washbasin Water Faucet Installation pcs 3,00 24,56

7 Hand-washing Faucet Installation unit 5,00 40,98

8 Mirror Installation in Washbasin unit 3,00 46,25

9 Floor Drain Installation unit 5,00 18,95

10 Washbasin Installation unit 3,00 218,98

11 Sitting Closet Installation unit 5,00 542,98

12 Tissue Place Installation unit 5,00 28,98

13 Soap Place Installation unit 1,00 42,78

14 Reinforced Concrete Septic Tank and Infiltration Well unit 1,00 2.176,98

15 Water Pump unit 1,00 2.276,98

16 Stainless Steel Tank with 1600 Liters Capacity unit 2,00 580,90

XII ELECTRICITY WORK

1 NYM Cable Point 3 x 2.5 mm2 Installation point 68,00 80,90

16 2 Electrical Current Outlet and NYM Cable 3 x 2.5 mm2 Installation point 21,00 52,50

3 Electrical Current Outlet for Ac NYY 3x4 mm2 Installation point 5,00 80,40

4 Single Switch Installation pcs 9,00 10,86

5 Multiple Switch Installation pcs 11,00 14,86

6 Ex-Philips Light Point Installation pcs 16,00 8,88

7 AC Installation pcs 5,00 8,88

8 Mercury Lamp Installation unit 2,00 84,60

9 Neon Lamp Installation unit 30,00 48,95

10 Down Light Lamp Installation unit 2,00 34,80

14 Spotlight Installation unit 2,00 88,00

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63

16 Fan Installation unit 3,00 182,00

17 Ac 2Pk Installation unit 5,00 650,00

18 Exhaust Fan Installation unit 3,00 285,00

19 MCB Installation set 1,00 1.200,00

20 ARDE Installation pcs 1,00 25,00

21 Panel Board Installation unit 1,00 823,00

22 Electric Meters Installation unit 1,00 780,00

Source: Analysis Result of 2017

3.2.2 Calculating Labor Productivity

After equalizing the volume obtained, then each

activity/unit/day can be determined. The analysis uses

Indonesian National Standard 2013 with working hours

calculated 8 hours of work/day.

[0]

In addition, working hours on

the building construction project in Dili Timor-Leste uses 8

hours of work/day

.

For example, productivity calculation for

footing is presented below:

Table 5. Coefficient of Labor Productivity

RESOURCE COEFFICIENT

Workers 3.400 OH

Bricklayers 0.850 OH

Head of the Bricklayers 0.085 OH

Foreman 0.170 OH

Therefore, in 1 day (8 working hours based on Indonesian

National Standard 2013), productivity per working group can

be obtained of:

1 day / 0.850 BRICKLAYER = 1.18 m3, so for,

1 day (8 hours working in field)

= 8/8 x 1.18 = 1.18 m3. It needs (1 Labor),

= 1.18 x 3.400 = 4.02m3. It needs (4 Workers),

= 1.18 x 0.085 = 0.10m3. It needs (0.1 Head of Bricklayer),

= 1.18 x 0.170 = 0.20 m3. It needs (0.

[0]

2 Foreman),

The above calculation is used to find productivity from other

types of work and the productivity calculation result can be

seen in the table below

.

Table 6. Calculation of Labor Productivity

No. TYPE OF WORK EQUIVALENT _VOLUME INDONESIAN NATIONAL STANDARD 2013 PRODUCTIVITY OF LABOR BASED ON ONE/DAY/GROUP

PRODUCT OF 8 WORKING

HOURS PER DAY

1 Preparatory work 67 0,1 Foreman+0,1 Head of Labor+1 Labor+2 6,25 11

Workers

2 Land Work 241 _{0,1 Foreman+1 Worker}3,33 72

3 Footing 69 0,1 Foreman+0,1 Head of Labor+1 Head of Labor 2,78 25

+ 2 Workers

4 Wall Work 250 0,1 Foreman + 0,1 Head of Labor+1 Labor+ 3 4,46 56

Workers

5 Concrete and Structure Work 67 0,1 Foreman+ 0,1 Head of Labor+ 1 Labor + 2 0,71 96 Workers

6 Flooring 692 0,1 Foreman+0,1 Foreman 1 Head of Labor + 2 11,11 62

Workers

7 Roofing 7815 0,1 Foreman + 0,1 Head of Labor+1 Labor+10 166,67 24

Workers

8 Ceiling 754 1 Labor +0,5 Foreman +10 Head of Labor+10 24,05 31

Workers

9 Door & Window Work 20 _{0,1 Foreman+6 Workers}6,25 3

10 Painting 1389 0,1 Foreman+0,1 Head of Labor+1 Labor+2 23,81 58

Workers

(10)

64 0,1 Foreman+0,1 Head of Labor +1 Labor+2

Workers

12 Electricity Work 16 0,1 Foreman + 0,1 Head of Labor+ 1 Labor+ 4 5,00 3

Workers

Source: Analysis Result of 2017

3.2.3. Calculating Duration and Labor Group at Normal

Time

To determine the duration of each group of work, it should pay

attention on the experience, capability, and availability of

human resources used.

Table 7. Calculation of Normal Duration and Labor Group Building of Worship Place in Dili Timor-Leste

Type of work Labor Group Productivity Volume Generated _EqualizedVolume Duration

a b c d e f Preparatory work 1 6,25 6,25 66,50 11 Land Work 2 4,33 8,66 241 28 Footing 2 2,78 2,78 72 `30 Wall work 2 4,46 8,92 250 28 Concrete work 2 0,70 0,70 67 56 Flooring 2 11,00 22,00 692 31 Roofing 2 166,67 333,34 3.991 12 Ceiling 3 10,00 20,00 754 25

Door & Window

Works 1 6,25 6,25 20 3

Painting 3 23,81 71,43 1.389 24

Piping 3 10,00 30,00 285 14

Electricity Work 1 5,00 5,00 16 3

Source: Analysis Result of 2017

3.3. Analysis of Scheduling Acceleration Using Time

Cost Trade Off

3.3.1 Interdependence Logic of Activities

Arranging the working network in accordance with the

sequence of interdependence logic relationship between

activities and work between activities with each other must be

in line with the method of project completion, so that

reasonable technical logic is taken into account in the

arrangement.

Table 8. Interdependence Logic of Activities

No.[0] Work Code Preceding Duration

1 Preparatory work A - 11

2 Land Work B A 28

3 Footing C B `30

4 Wall work D E 28

5 Concrete and Structure Work E C 56

6 Flooring F H 31

7 Roofing G D 12

8 Ceiling H G 25

9 Door & Window Works I F 3

10 Painting J D 24

11 Piping K C 14

12 Electricity Work L H 3

Source:

Analysis Result of 2017

3.3.2.

[0]

Determining the Critical Path

Determination of critical path using Gantt Chart Microsoft

Project scheduling application program, critical paths are

obtained which are A-B-C-D-E-H-J

3 .

3.3. Calculation of Cost Slope and Acceleration of

Project Duration

After knowing the critical path in the normal time with a total

(11)

65

180 days, then acceleration of the project duration on the

Construction of Worship Building in Dili Timor-Leste is done.

Table 9.

[0]

Calculation of Cost Slope and Normal Duration

No. [0] CODE OF _WORK PRECEDING _WORK _PRODUCTTIME (DAY) _NORMAL _PRODUCT COST _NORMAL _SLOPECOST

1 A 11 11 $ 22,20 $ 22,20 -- 2 B A 72 19 $ 31,20 $ 62,40 $ 34,17 3 C B 60 26 $ 22,44 $ 22,44 $ 14,4 4 D E 56 28 $ 29,28 $ 58,56 $ 30,1 5 E C 112 56 $ 66,20 $ 66,20 $ 75,6 6 F H 63 31 $ 16,20 $ 32,40 $ 0,7 7 G D 24 12 $ 79,00 $ 158,00 $ 142,7 8 H G 75 25 $ 22,20 $ 66,60 $ 41,2 9 I F 3 3 $ 39,00 $ 39,00 -- 10 J D 97 24 $ 28,20 $ 84,60 $ 88,2 11 K C 55 14 $ 40,20 $ 160,80 $ 146,4 12 L H 3 3 $ 34,20 $ 34,20 $ 430,32 $ 785,20 $ 573,4

Source: Analysis Result of 2017

[0]

Table 10. Calculation Result of Cost Slope and Duration Acceleration in the First Phase

[0]

No. [0] Code of _Work Preceding Work Time (Day) Cost _SlopeCost

Normal Crash Normal Crash

1 A 11 11 $ 22,20 $ 22,20 2 B A 28 19 $ 62,40 $ 93,60 $ 72,4 3 C B 30 30 $ 44,88 $ 44,88 4 D E 28 28 $ 58,56 $ 58,56 5 E C 56 56 $ 132,40 $ 132,40 6 F H 31 31 $ 32,40 $ 32,40 7 G D 12 12 $ 158,00 $ 158,00 8 H G 25 25 $ 66,60 $ 66,60 9 I F 3 3 $ 39,00 $ 39,00 10 J D 24 24 $ 112,80 $ 112,80 11 K C 14 14 $ 160,80 $ 160,80 12 L H 3 3 $ 34,20 $ 34,20 $ 924,24 $ 933,24 $ 72,4

Source: Analysis Result of 2017

[0]

Table 11. Calculation of Duration Acceleration and Working Group in the Second Phase

[0]

№. [0] Type of work _BeforeWorking Group _After Product _BeforeVolume Generated _After Equivalent _Volume Duration Duration

1 Preparatory work 1 1 6,25 6,25 6,25 67 10,64 11

2 Land Work 2 3 4,33 12,99 12,99 241 18,54 19

3 Footing 2 2 2,78 2,78 5,56 72 12,88 20

4 Wall work 2 2 4,46 8,92 8,92 250 27,98 28

5 Concrete _{Structure Work}and 2 2 0,60 1,20 1,20 67 56,21 56

6 Flooring 2 2 11,00 22,00 22,00 692 31,47 31

7 Roofing 2 2 166,67 333,34 333,34 3991 11,97 12

8 Ceiling 3 3 10,00 30,00 30,00 754 25,12 25

9 Door & Window _Works 1 1 6,25 6,25 6,25 20 3,12 3

10 Painting 4 4 23,81 95,24 95,24 2317 24,32 24

11 Piping 4 4 10,00 40,00 40,00 548 13,69 14

12 Electricity Work 1 1 5,00 5,00 5,00 16 3,18 3

Source:

Analysis Result of 2017

(12)

66

Table 12. Calculation Result of Cost Slope and Duration Acceleration Duration in the Second Phase

No.[0] Code of Work Preceding Work _NormalTime (Day) _Crash _Normal Cost _Crash _SlopeCost

1 A 11 11 $ 22,20 $ 22,20 2 B A 28 19 $ 62,40 $ 93,60 $ 72,4 3 C B 30 20 $ 44,88 $ 44,88 $ 45,8 4 D E 28 28 $ 58,56 $ 58,56 5 E C 56 56 $ 132,40 $ 132,40 6 F H 31 31 $ 32,40 $ 32,40 7 G D 12 12 $ 158,00 $ 158,00 8 H G 25 25 $ 66,60 $ 66,60 9 I F 3 3 $ 39,00 $ 39,00 10 J D 24 24 $ 112,80 $ 112,80 11 K C 14 14 $ 160,80 $ 160,80 12 L H 3 3 $ 34,20 $ 34,20 13 $ 924,24 $ 955,68 $ 118,2

Source:

Analysis Result of 2017

Table 13. Calculation of Duration Acceleration and Labor Group in the Third Phase

№.[0] Type of work _BeforeWorking Group _After Product Volume Generated _Before _After Equivalent _Volume Duration Duration

A B C D E F G H

1 Preparatory work 1 1 6,25 6,25 6,25 67 10,64 11

2 Land Work 2 3 4,33 86,99 12,99 241 18,54 19

3 Footing 2 3 1,19 2,38 3,57 72 20,06 20

4 Wall work 2 2 4,46 8,92 8,92 250 27,98 28

5 Concrete and _{Structure Work} 2 3 0,60 1,20 180 67 37,47 37

6 Flooring 2 2 11,00 22,00 22,00 692 31,47 31

7 Roofing 2 2 166,67 333,34 333,34 3991 11,97 12

8 Ceiling 3 3 10,00 30,00 30,00 754 25,12 25

9 Door & Window _Work 1 1 6,25 6,25 6,25 20 3,12 3

10 Painting 4 4 23,81 95,24 95,24 2317 24,32 24

11 Piping 4 4 10,00 40,00 40,00 548 13,69 14

12 Electricity Work 1 1 5,00 5,00 5,00 16 3,18 3

Source:

Analysis Result of 2017

Table 14. Calculation Result of Cost Slope and Duration Acceleration in the Third Phase

No.[0] Code of _Work Preceding _Work _NormalTime (Day) _Crash _Normal Cost _Crash _SlopeCost

1 A 11 11 $ 22,20 $ 22,20 2 B A 28 19 $ 62,40 $ 93,60 $ 72,4 3 C B 30 20 $ 44,88 $ 67,32 $ 45,8 4 D E 28 28 $ 58,56 $ 58,56 5 E C 56 37 $ 132,40 $ 198,60 $159,2 6. [0] _F _H ₃₁ ₃₁ _{$ 32,40} _{$ 32,40} 7. [0] G D 12 12 $ 158,00 $ 158,00 8 H G 25 25 $ 66,60 $ 66,60 9 I F 3 3 $ 39,00 $ 39,00 10 J D 24 24 $ 112,80 $ 112,80 11 K C 14 14 $ 160,80 $ 160,80 12 L H 3 3 $ 34,20 $ 34,20 $ 924,24 $ 1.021,88 [0] $ 262,9

Source:

Analysis Result of 2017

Table 15. Calculation of Duration Acceleration and Labor Group in the Fourth Phase

№. Type of work _BeforeWorking Group _After Product _BeforeVolume Generated _After Equivalent _Vol Duration Duration

1 Preparatory _work 1 1 6,25 6,25 6,25 67 10,64 11

2 Land Work 2 3 4,33 86,99 12,99 241 18,54 19

(13)

67

4 Wall work 2 2 4,46 8,92 8,92 250 27,98 28

5 Concrete and _{Structure Work} 2 3 0,60 1,20 180 67 37,47 37

6 Flooring 2 2 11,00 22,00 22,00 692 31,47 31

7.[0] Roofing 2 3 166,67 333,34 500,01 3991 7,98 8

8 Ceiling 3 3 10,00 30,00 30,00 754 25,12 25

9 Door _{Window Work}& 1 1 6,25 6,25 6,25 20 3,12 3

10 Painting 4 4 23,81 95,24 95,24 2317 24,32 24

11 Piping 4 4 10,00 40,00 40,00 548 13,69 14

12 Electricity _Work 1 1 5,00 5,00 5,00 16 3,18 3

Source:

Analysis Result of 2017

Table 16. Calculation Result of Cost Slope and Duration Acceleration in the Fourth Phase

No.[0] Code of _Work Preceding Work Time (Day) Cost

Cost Slope

Normal Crash Normal Crash

1 A 11 11 $ 22,20 $ 22,20 2 B A 28 19 $ 62,40 $ 93,60 $ 72,4 3 C B 30 20 $ 44,88 $ 67,32 $ 45,8 4 D E 28 28 $ 58,56 $ 58,56 5 E C 56 37 $ 132,40 $ 198,60 159,2 6 F H 31 31 $ 32,40 $ 32,40 7 G D 12 8 $ 158,00 $ 23,00 215,8 8 H G 25 25 $ 66,60 $ 66,60 9 I F 3 3 $ 39,00 $ 39,00 10 J D 24 24 $ 112,80 $ 112,80 11 K C 14 14 $ 160,80 $ 160,80 12 L H 3 3 $ 34,20 $ 34,20 $ 924,24 $ 1.100,88 $ 478,8

Source: Analysis Result of 2017

4.3.4. Calculating the Cost of Acceleration Time

From the calculation analysis of the building scheduling time

obtained with the steps as follows:

acceleration above, then direct costs and indirect costs are

Table 17. Cost Per Day of Labor of Worship Building Project in Dili Timor Leste

No. Type of work Unit of Labor Costs Labor Productivity _{Cost / day}Total

1 Preparatory work

Foreman $ 12,00 _6,25

$ 22,2

Head of Labor $ 10,00

Labor $ 8,00 0,1 Foreman+0,1 Head of Labor + 1

Labor+ 2 Workers Worker $ 6,00 2 Land Work Foreman 12,00 _3,33 $ 31,2 Head of Labor $ 10,00

Labor $ 8,00 _{0,1 Foreman + 5 Workers}

Worker $ 6,00

3 Footing

Foreman $ 12,00 1,19

$ 22,44 Head of Labor $ 10,00 _{0,12 Foreman+0,1 Head of Labor + 1}

Labor+ 2 Workers Labor $ 8,00 Worker $ 6,00 4 Wall work Foreman $ 12,00 4,46 $ 29,28 Head of Labor $ 10,00 _{0,19 Foreman + 0,1 Head of Labor+ 1}

Labor + 3 Workers

Labor $ 8,00

Worker $ 6,00

5 _{Structure Work}Concrete and

Foreman $ 12,00 _0,6

$ 66,2

Carpenter $ 8,00

0,1 Foreman + 0,1 Head of Labor + 1 Carpenter + Bricklayer + Blacksmith 6

Workers

Bricklayer $ 8,00

Blacksmith $ 8,00

Worker $ 6,00

(14)

68

0,1 Foreman +0,1 Head of Labor + 0,1 Labor + 1 Worker $ 16,2 Labor $ 8,00 Worker $ 6,00 7 Roofing Foreman $ 12,00 166,67 $ 79

Head of Labor $ 10,00 0,5 Foreman + 0, 1 Head of Labor + 0,5 _{Labor+ 10 Workers}

Labor $ 8,00 Worker $ 6,00 8 Ceiling Foreman $ 12,00 _20,00 $ 22,2 Head of Labor $ 10,00

0,1 Foreman + 0,1 Head of Labor+ 1 Labor + 2 Workers

Labor $ 8,00

Worker $ 6,00

9 Door and Window _Work

Foreman $ 12,00 _6,25

Head of Labor

Labor $ 8,00 _{0,25 Foreman + 6 Workers}

Worker $ 6,00

10 Painting

Foreman $ 12,00 _23,81

$ 28,2

0,6 Foreman +01 Head of Labor + 1 Labor + 2 Workers Labor $ 8,00 Worker $ 6,00 11 Piping Foreman $ 12,00 _10,00 $ 40,2 Head of Labor $ 10,00 _{0,1 Foreman + 0,1 Head of Labor + 1}

Labor + 5 Workers Labor $ 8,00 Worker $ 6,00 12 Electricity Work Foreman $ 12,00 _5,00 $ 34,2 Head of Labor $ 10,00

1 Foreman + 1 Head of Labor + 1 Labor + 4 Workers

Labor $ 8,00

Worker $ 6,00

Source

:

[0]

Analysis Result of 2017

Table 18

.

[0]

Cost of Labor Group at Normal Time and Acceleration Time in the First Phase

No. [0] TYPE OF WORK COST OF LABOR GROUP

PER DAY

COST OF LABOR GROUP PER

NORMAL DAY OF 233 DAYS COST OF LABOR GROUP PER CRASH DAY OF 214 DAYS GROUP

TOTAL COST TOTAL GROUP TOTAL COST TOTAL

1 Preparatory work $ 22,20 1 $ 22,20 1 $ 22,20

2 Land Work $ 31,20 2 $ 62,40 3 $ 93,60

3 Footing $ 22,44 2 $ 44,88 2 $ 67,32

4 Wall work $ 29,28 2 $ 58,56 2 $ 58,56

5 Concrete and Structure _Work $ 66,20 2 $ 132,40 2 $ 132,40

6 Flooring $ 16,20 2 $ 32,40 2 $ 32,40

7 Roofing $ 79,00 2 $ 158,00 2 $ 237,00

8 Ceiling $ 22,20 3 $ 66,60 3 $ 66,60

9 Door and Window Work $ 39,00 1 $ 39,00 1 $ 39,00

10 Painting $ 28,20 4 $ 84,60 4 $ 112,80

11 Piping $ 40,20 4 $ 120,60 4 $ 160,80

12 Electricity Work $ 34,20 1 $ 34,20 1 $ 34,20

$ 924,24 $ 924,24

(15)

69

Table 19. Cost of Labor Group at Normal Time and Acceleration Time in the Second Phase

No.[0] TYPE OF WORK COST OF LABOR GROUP PER DAY

1 Preparatory work $ 22,20 1 $ 22,20 1 $ 22,20 2 Land Work $ 31,20 2 $ 62,40 3 $ 93,60 3 Footing $ 22,44 2 $ 44,88 3 $ 67,32 4 Wall work $ 29,28 2 $ 58,56 2 $ 58,56 5 Concrete and Structure _Work $ 66,20 2 $ 132,40 2 $ 132,40 6 Flooring $ 16,20 2 $ 32,40 2 $ 32,40 7 Roofing $ 79,00 2 $ 158,00 2 $ 237,00 8 Ceiling $ 22,20 3 $ 66,60 3 $ 66,60 9 Door and Window Work $ 39,00 1 $ 39,00 1 $ 39,00 10 Painting $ 28,20 4 $ 84,60 4 $ 112,80

11 Piping $ 40,20 4 $ 120,60 4 $ 160,80 12 Electricity Work $ 34,20 1 $ 34,20 1 $ 34,20

$ 924,24 $ 977,88

Source:

Analysis Result of 2017

Table 20. Cost of Labor Group at Normal Time and Acceleration Time in the Third Phase

№.[0] TYPE OF WORK COST OF LABOR GROUP PER DAY

1 Preparatory work $ 22,20 1 $ 22,20 1 $ 22,20 2 Land Work $ 31,20 2 $ 62,40 3 $ 93,60 3 Footing $ 22,44 2 $ 44,88 3 $ 67,32 4 Wall work $ 29,28 2 $ 58,56 2 $ 58,56 5 Concrete and Structure _Work $ 66,20 2 $ 132,40 3 $ 198,60 6. [0] Flooring $ 16,20 2 $ 32,40 2 $ 32,40

7 Roofing $ 79,00 2 $ 158,00 2 $ 237,00 8 Ceiling $ 22,20 3 $ 66,60 3 $ 66,60 9 Door and Window Work $ 39,00 1 $ 39,00 1 $ 39,00 10 Painting $ 28,20 4 $ 84,60 4 $ 112,80

11 Piping $ 40,20 4 $ 120,60 4 $ 160,80 12 Electricity Work $ 34,20 1 $ 34,20 1 $ 34,20

$ 924,24 $ 1.044,08

Source: Analysis Result of 2017

Table 21. Cost of Labor Group at Normal Time and Acceleration Time in the Fourth Phase

No. Type of Work

Cost of Labor Group Per Day

Cost of Labor Group Per Normal Day of 233

Days Cost of Labor Group Per Crash Day of 181 Days

Group Total Cost Total Group Total Cost Total

1 Preparatory work $ 22,20 1 $ 22,20 1 $ 22,20 2 Land Work $ 31,20 2 $ 62,40 3 $ 93,60 3 Footing $ 22,44 2 $ 44,88 3 $ 67,32 4 Wall work $ 29,28 2 $ 58,56 2 $ 58,56 5 Concrete _{Structure Work}and $ 66,20 2 $ 132,40 3 $ 198,60 6 Flooring $ 16,20 2 $ 32,40 2 $ 32,40 7 Roofing $ 79,00 2 $ 158,00 3 $ 237,00

(16)

70

8 Ceiling $ 22,20 3 $ 66,60 3 $ 66,60 9 Door and Window _Work $ 39,00 1 $ 39,00 1 $ 39,00 10 Painting $ 28,20 4 $ 84,60 4 $ 112,80 11 Piping $ 40,20 4 $ 120,60 4 $ 160,80 12 Electricity Work $ 34,20 1 $ 34,20 1 $ 34,20

$ 924,24 $ 1.123,08

Source: Analysis Result of 2017

The acceleration result done in the project provides

consequence of additional costs in which under normal

schedule condition, the project normal cost is obtained of $

377.552,868, - thus, after doing TCTO analysis in the project,

there is an additional direct cost in the project of $ 1.123,08 so

that the total cost of the project becomes $ 378.675,95 in

which it is in accordance with the acceleration that has been

done in the project; then the overall results of new schedule

have activities that have been accelerated. It is based on the

data of acceleration duration on activity B, C, E, G Table 4.21

in acceleration scheduling. New scheduling results obtain the

project completion time which is previously 233 days and it

becomes to 181 days, therefore, there is a time difference of

34 days from the project normal schedule.

5. C

ONCLUSION

From the scheduling acceleration analysis of the worship

building construction in Dili Timor-Leste by using time cost

trade off (TCTO) method, the following results are obtained:

1. The result of normal time scheduling obtained in the project

completion in the initial time of 223 days.

2. The time that can be obtained on the implementation of

Christian church building construction in Dili which is

originally 223 days changed to 181 days, so that there is a

time difference of 42 days from the normal schedule of the

project.

3. The direct cost of the Christian church building project in

Dili under normal project schedule condition is $

377.552,868, then after (TCTO) is done in the project,

there is an additional direct cost in the project of 1.123,08,

thus, the total cost of the project is $ 378.675,95.

6. S

UGGESTION

Based on the above conclusion, some suggestions may be

useful for further researches that take the same method as

material for the acceleration of time on the project:

1. In the implementation of project in the field, it should be

noted the critical activities because if the activity's

completion time is late, then it leads to the delay of other

activities.

2. Further researches should be more detailed regarding to

the more detailed activities in project completion, hence, it

will assist in the model design, the interrelation

determination between the activity and the time

estimation.

3. In terms of policy making, it needs better planning and

supervision of project activities, so that the delay does not

occur during project implementation.

R

EFERENCES